diff --git a/label_studio/core/utils/serializer_to_openapi_params.py b/label_studio/core/utils/serializer_to_openapi_params.py
index 8fd7068ecf63..2d6f0ac14fdc 100644
--- a/label_studio/core/utils/serializer_to_openapi_params.py
+++ b/label_studio/core/utils/serializer_to_openapi_params.py
@@ -141,11 +141,8 @@ def _get_field_config(field: serializers.Field, overrides: dict) -> dict:
 
     elif isinstance(field, serializers.JSONField):
         config['type'] = OpenApiTypes.OBJECT
-
     elif isinstance(field, serializers.ListField):
-        config['type'] = OpenApiTypes.ARRAY
-        child_type = _map_field_type(field.child) if hasattr(field, 'child') else OpenApiTypes.STR
-        config['extra_kwargs']['items'] = {'type': child_type}
+        config['type'] = OpenApiTypes.STR
 
     return config
 
@@ -170,7 +167,7 @@ def _map_field_type(field: serializers.Field) -> str:
     elif isinstance(field, serializers.DecimalField):
         return OpenApiTypes.NUMBER
     elif isinstance(field, serializers.ListField):
-        return OpenApiTypes.ARRAY
+        return OpenApiTypes.STR
     elif isinstance(field, serializers.JSONField):
         return OpenApiTypes.OBJECT
     elif isinstance(field, serializers.DictField):
diff --git a/poetry.lock b/poetry.lock
index 2b78c5484fa1..f78b4bb0c671 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2143,7 +2143,7 @@ optional = false
 python-versions = ">=3.9,<4"
 groups = ["main"]
 files = [
-    {file = "037011c9d6c84050d6a7fe3777310d33a84603d6.zip", hash = "sha256:2c2d4ff3698915ce1c7b926728eb2f0bff7a3117eb752b79d190aec1a69f5511"},
+    {file = "8a328fe1b3d9d50154a69b6b23668e64c5aa86ec.zip", hash = "sha256:2f83599094cf72fdadf601b04af483c1d059f87e8526138f2e0aea082a80c48d"},
 ]
 
 [package.dependencies]
@@ -2171,7 +2171,7 @@ xmljson = "0.2.1"
 
 [package.source]
 type = "url"
-url = "https://github.com/HumanSignal/label-studio-sdk/archive/037011c9d6c84050d6a7fe3777310d33a84603d6.zip"
+url = "https://github.com/HumanSignal/label-studio-sdk/archive/8a328fe1b3d9d50154a69b6b23668e64c5aa86ec.zip"
 
 [[package]]
 name = "launchdarkly-server-sdk"
@@ -5117,4 +5117,4 @@ uwsgi = ["pyuwsgi", "uwsgitop"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.10,<4"
-content-hash = "be2f184b40ba7bbe4e03bb663f76b5a8e82c1c124586cb3b692c4ffbd35b9352"
+content-hash = "8663235819b649bdb95b5bc1cf795f9d85bb0bbc8523f0839e70ac43d202c4d0"
diff --git a/pyproject.toml b/pyproject.toml
index 706480cd3076..9df8677154f4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -75,7 +75,7 @@ dependencies = [
     "tldextract (>=5.1.3)",
     "uuid-utils (>=0.11.0,<1.0.0)",
     ## HumanSignal repo dependencies :start
-    "label-studio-sdk @ https://github.com/HumanSignal/label-studio-sdk/archive/037011c9d6c84050d6a7fe3777310d33a84603d6.zip",
+    "label-studio-sdk @ https://github.com/HumanSignal/label-studio-sdk/archive/8a328fe1b3d9d50154a69b6b23668e64c5aa86ec.zip",
     ## HumanSignal repo dependencies :end
 ]